JPS62180394A - Color alteration system for cursor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention, when the color of the cursor on a color image display device and the color of the image are the same, changes the color code of the cursor at the position of the same color, and identifies the cursor. It facilitates

[Industrial application field]

The present invention relates to a color image display device, and more specifically, to a method for changing the color of a portion where the color of a cursor and the color of an image are the same.

A color image display device uses a cross-shaped or large cursor, but its color is fixed.

Therefore, there has been a need for a simple cursor display method that can be identified even when a part or all of the cursor overlaps an image portion of the same color as the cursor.

[Prior art and problems to be solved by the invention] In conventional color image display devices, when the cursor overlaps an image area of the same color, the color of the image area of the same color is changed. , which made it possible to identify the cursor. Therefore, in addition to the loss of the original color of the image, if the color rewriting is over a wide area, the problem is that it takes a long time to rewrite the color and the image display lacks smoothness. .

The present invention was devised in view of these points.
The purpose of this invention is to provide a cursor color changing method that allows cursor identification with a simple configuration.

[Means for Solving the Problems and Their Effects] This invention compares the color of a cursor with the color of the original image at the position where the cursor is located, and detects parts that are the same color. An arithmetic circuit is provided that changes the color code of the cursor in that area when the cursor is pressed.

This method changes the color code of only the cursor parts that have the same color, so it is possible to identify the display cursor with less time delay, and the colors of other parts of the original image are maintained unchanged. Ru.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in the drawings. The same reference numerals indicate the same objects throughout the figures.

FIG. 1 is a block diagram showing the configuration of the first embodiment. An arithmetic circuit 1 for controlling cursor color change is provided on the input side of screen memory planes 2-0 to 2-n, and cursor information is transferred to the memory planes. This is the case when it is expanded to In the same figure, ■
2-0 to 2-n are arithmetic circuits, 2-0 to 2-n are screen memory planes, 3 is a write/read switching circuit, 5 is a color lookup table, 6 is a data generator for graphics and cursor color codes, and 7 is a scan control It is a circuit.

First, the arithmetic circuit 1 reads graphic color code data D, while the cursor write signal is write-inhibited. When ~Din is input, it is transmitted as is to the memory planes 2-0 to 2-n and input. These stored addresses are input to each memory plane via the fortune-telling/reading switching circuit 3. In this state, the data D0 of each memory plane is returned from each output circuit to the arithmetic circuit 1 via the comparison wiring 8.

Next, with the cursor write signal enabling the cursor reading of the arithmetic circuit 1, the cursor color code data 010 to D6. , is input to the arithmetic circuit 1.

The calculation circuit 1 compares the color code of the figure and the color code of the cursor for each display dot, and when they are the same, performs a predetermined calculation to change the color code of the same color, and stores the data of the calculation result. D. Output O'''Don and rewrite memory plane 2.

The rewriting is performed only on one part or the entire part of the cursor where the shape and color are the same, and there is no need to rewrite other wide areas, so the time required for rewriting is short and the cursor is differentiated. display becomes possible.

A concrete circuit of the arithmetic circuit 1 is shown in FIG. To make the explanation easier to understand, it is assumed that an l-bit operation is performed. In the same figure, G1 is an AND gate, and G2 is an A gate with one input inverted.
ND game 1-1G3 is Italusive OR gate, G4
is an OR gate.

The calculation of this circuit 1 is based on, for example, the data content part of the memory plane 2. is "11", the cursor line 1 signal is "II" indicating enable, and the cursor color code D is "11", then they mean the same color and the OR gate G4 outputs " It outputs "L" and changes the data content of the memory plane 2, which was originally "H", to "L". If the color code D of the cursor is "yes", it means that the color is different, and the output signal from the OR game G4 is "11", and the contents of the memory plane 2 remain unchanged. When the cursor write signal is "pi", the input signal to the arithmetic circuit 1 is input to the memory plane 2 as is.

As can be seen from the above explanation, the arithmetic circuit 1 inverts the bit data stored in the memory plane 2 when the colors of the cursor and the figure are the same.

Referring again to FIG. 1, in a cycle for displaying on a display unit such as a CRT, the write/read switching circuit 3
is switched, and the read scan address coming from the scan control circuit 7 specifies the S sale address to the memory planes 2-0 to 2-n.

The color table 5 is a conversion table programmed in advance, and is a conversion table programmed in advance for memory planes 2-0 to 2-2.
Using the color code from n as a key, R (red), G (green),
Search for the components of each of the three primary colors of B (blue) and press D/ on the display.
^Output to the conversion circuit.

FIG. 3 shows a second embodiment of the invention. This example is
Unlike the previous embodiment, the arithmetic circuit 1' is connected to the memory plane 2.
-0 to 2-n and the color lookup table 5. In this figure, the same numbers as in FIG. 1 indicate the same things.

1' is an arithmetic circuit, which is different in configuration from the arithmetic circuit 1 shown in FIG. 1, and its circuit configuration is shown in FIG. Further, the data input to the memory planes 2-0 to 2-n is only the color code D1 of the 6' figure. 4 is a cursor signal generation circuit, which has a cursor color code and address data;
When a readout scanning address signal is received from the scanning control circuit 7 and the address where the cursor is located is specified, the color code of the cursor is sent to the arithmetic circuit 1'. At the same time, in accordance with the same address instruction received via the write/read switching circuit 3, the memory plane 2 sends the color code of the figure at the same address to the arithmetic circuit 1''.The arithmetic circuit 1' If both codes are the same, a predetermined calculation is performed to convert the cursor color code and output to the color lookup table 5.

Reference numeral 65 in the circuit example in FIG. 4 is an italusive OR gate, and when there is cursor color data, that is, when the "11" signal is input, the pin of the color code of the figure is inverted.
When there is no cursor color data, that is, when an "L" signal is input, the color code of the figure is transferred to the color look amplifier table 5 as is.

In the above two embodiments, calculations for one focus have been explained, but it is of course possible to provide a multi-bit calculation circuit of the designer's choice in addition to these stripping circuits.

In these two embodiments, the circuit shown in FIG. 1 has a lower processing speed than the circuit shown in FIG. 3, but is less expensive. On the other hand, the circuit shown in FIG. 3 performs arithmetic processing depending on the timing of the readout scan for display, so the circuit is complicated and expensive, but it is fast.

Each of the individual circuits shown in the above block diagrams can be constructed using conventional techniques, and therefore, detailed explanations will be omitted.

〔Effect of the invention〕

As described above, according to the present invention, by adding a simple circuit, the color of the original image can be maintained in a short processing time even when the cursor moves over the same graphic image as the cursor color. The cursor can be easily recognized while the cursor is in the position, and its industrial effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a configuration diagram of an example of the arithmetic circuit in FIG. 1, FIG. 3 is a block diagram showing a second embodiment of the present invention, and FIG. The figure is an example configuration diagram of the arithmetic circuit in FIG. 3. In the figure, 1 and 1 are arithmetic circuits, 2-0 to 2-n are memory planes, and 5 is a color look-up table. 4 Every morning's o 1 Den Eda J diagram 1 Orhat 31-Roho JBω 2nd diagram/T, invention n sai 2 pill implementation required 3 sensai 2's m1 ship calculation cycle rebirth sentence required 1st 4F! M

Claims (1)

[Scope of Claims] In a color image display device that allows data to be input at a position indicated by a cursor, the color of the cursor is compared with the color of the original image at the position where the cursor is located using their color codes. A cursor color changing method characterized in that when parts having the same color are detected, the cursor color code of that part is changed.